Catolé do Rocha weather in September

In September, Catolé do Rocha sees average daytime highs of 34°C and overnight lows near 22°C, with 1 mm of rain across 0.1 wet days and about 12 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 71% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Catolé do Rocha's 1st-clearest and 2nd-windiest month. For the whole year in context, see Catolé do Rocha's year-round climate.

Daytime high
34°
4th warmest
Overnight low
22°
3rd coldest
Rainfall
1 mm
0.1 wet days
Daylight
12 hours
5:26 AM – 5:24 PM
Cloud cover
29%
1st clearest
Wind
17 km/h
2nd windiest
Solar energy
6.73 kWh/m²
Travel score
3.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical September day in Catolé do Rocha reaches about 34°C in the afternoon and slips back to 22°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13421
23422
33422
43422
53422
63422
73422
83422
93422
103422
113422
123422
133422
143422
153422
163422
173522
183522
193522
203522
213522
223522
233522
243522
253522
263522
273522
283522
293522
303522

How September really feels in Catolé do Rocha

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Catolé do Rocha weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 24°689.412.32.9
Feb34° / 24°8711.312.23.0
Mar33° / 23°11714.7123.2
Apr32° / 23°961311.93.5
May32° / 23°417.211.74.1
Jun32° / 22°214.111.64.7
Jul32° / 21°11211.74.8
Aug33° / 21°50.511.84.4
Sep34° / 22°10.1123.7
Oct35° / 23°90.412.13.1
Nov35° / 23°20.412.33.0
Dec35° / 24°142.712.42.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 71% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28614
38614
48614
58515
68515
78515
88515
98515
108515
118515
128515
138515
148614
158713
168713
178713
188911
198911
209010
219010
22919
23919
24919
25919
26928
27928
28928
29919
30919

Chance of precipitation in September

Any precipitation

Catolé do Rocha gets around 1 mm of rain over 0.1 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 0% and peaks near 1% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
131627
231627
331627
431618
531618
631618
731618
831618
931618
1030628
1129638
1228648
1327658
1427658
1526668
1625678
1725678
1824688
1924688
2023698
2123698
2223698
2323698
2423698
2523698
2622708
2722708
2822699
2922699
3022699

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 5:34 AM to 5:19 AM, and sunset from 5:27 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:345:27
211.95:345:27
311.95:335:27
411.95:335:27
511.95:325:26
611.95:325:26
711.95:315:26
811.95:315:26
911.95:305:26
1011.95:305:25
1111.95:295:25
1211.95:295:25
1311.95:285:25
1412.05:275:25
1512.05:275:24
1612.05:265:24
1712.05:265:24
1812.05:255:24
1912.05:255:24
2012.05:245:24
2112.05:245:23
2212.05:235:23
2312.05:235:23
2412.05:225:23
2512.05:215:23
2612.05:215:22
2712.05:205:22
2812.05:205:22
2912.05:195:22
3012.05:195:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.73 kWh/m².

For context, solar energy here swings from a low near 4.76 kWh/m² to a high of 7.04 kWh/m² in October across the year — September's 6.73 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.6Intense
126.6Intense
136.6Intense
146.7Intense
156.7Intense
166.7Intense
176.8Intense
186.8Intense
196.8Intense
206.9Intense
216.9Intense
226.9Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.1Intense
287.1Intense
297.1Intense
307.1Intense
Planning a trip in September

Is September a good time to visit Catolé do Rocha?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.7
Sightseeing
5th-best month of the year
7.5
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Catolé do Rocha. The water and warmth also suit a beach or pool day.

What to pack for Catolé do Rocha in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Catolé do Rocha sees daytime highs around 34°C and nights near 22°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Catolé do Rocha in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Catolé do Rocha peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Jul 17UV 9
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme

Air quality in Catolé do Rocha in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Catolé do Rocha is worst in October — around 16 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (July, 5 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 2016 µg/m³Jul 135 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr9Good
May7Good
Jun5Good
Jul5Good
Aug6Good
Sep11Good
Oct16Moderate
Nov14Moderate
Dec12Moderate
Location & terrain

Where is Catolé do Rocha?

Catolé do Rocha sits at 6.3°S, 37.7°W, 303 m above sea level, in Brazil. The nearest listed city is São Bento, 7.0 km away.

Topography around Catolé do Rocha

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Catolé do Rocha.

Within 3 km, the terrain around Catolé do Rocha has only modest variations in elevation — a maximum elevation change of 193 m around an average of 286 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 556 m; within 80 km, large variations in elevation — a maximum elevation change of 821 m.

The land around Catolé do Rocha is covered by shrubs (54%) within 3 km, shrubs (63%) and grassland (21%) within 16 km, and shrubs (65%) and grassland (26%) within 80 km.

3 km
193 m
16 km
556 m
80 km
821 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: São Bento 7.0 km · Pombal 48 km · Pau dos Ferros 57 km · Caraúbas 65 km · Sousa 70 km · Caicó 73 km · Apodi 76 km · São Miguel 84 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Catolé do Rocha (-6.3439°, -37.7467°, elevation 303 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).